Reinforcement learning approach to generate goal-directed locomotion of a snake-like robot with screw-drive units. - Sromona Chatterjee; Timo Nachstedt; Florentin Wörgötter; Minija Tamosiunaite; Poramate Manoonpong; Yoshihide Enomoto; Ryo Ariizumi; Fumitoshi Matsuno (RAAD, 2014)